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HelpTest Code PTT PTT PARTIAL THROMBOPLAST TIME
Performing Location
Collection Instructions
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Fill vacutainer completely. If sample is to be tested within 4 hours of collection store at room temp. Refrigerate if testing will be done between 4 and 12 hours after collection. Separate and freeze plasma if testing done after 12 hours from collection time.
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Collection Instructions:
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Refer to Venipuncture Protocol
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Collection Container
1 Full Light Blue Top vacutainer Vitrated Plasma tube
Specimen Required/Volume
2.0 mL
Specimen Type
plasma
Turn-Around Guidelines
Daily upon arrival
Reference Values
23.9 - 31.3
Method
CA560-Photo-optical Clot Detection
CPT
85730
LOINC
14979-9
Special Handling
Non-heparinized patient plasma should be tested within 4 hours from time of collection if stored at 2-4°C or at 18-24°C. If testing is not complete within 4 hours, the plasma must be removed and frozen. A frost-free freezer should not be used.